Question about ZR4 Radar Detector

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When I use car siren, ZR4 is chirping

Whenever I use the car siren(Audi, Mercedes, new models of car) I can hear ZR4 chirping. When I release the siren, ZR4 stops chirping. Pls, let me know how to solve this problem?
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Vladimir Djelic

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  • 134 Answers

This is caused by electrical noise within your car's electrical system. Jump over to radardetector.net for suggestions about how to resolve this issue.

Posted on Mar 17, 2009

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You can find a copy of the manual at the link below or try this:

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If you know where your Valet switch is, turn the ignition on, push and release the valet switch once, then push and hold it, you should hear the siren chirp once, then while still holding the valet switch, push the #1 button on the remote, you should hear the siren chirp again. it is now programed. If you have the package that came with the remote, it should have a table on the back that tells you how many pushes of the valet for which feature you want to program. Most remotes are one push for all features, some are 7 or 8 pushes. So if it say auto learn is 7, turn the key on, push it 7 times, the push it again and hold it, the push #1 button, and it's programed. Hope this helps. If all else fails, take it to your nearest best buy, if they charge you to program it, it won't be much.

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2. Press and release the valet push-button switch three times.
3. The dash LED will flash once, and the siren will "chirp" once, indicating the system is ready to accept programming for channel 1 or the arm/disarm and panic functions.
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a. Pressing button #1 on the keychain transmitter.
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c. Pressing both buttons simultaneously on the keychain transmitter.
5. Press and hold the selected choice a, b, or c above, until the siren emits a long "chirp" to confirm that programming of channel 1 was successful.
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8. Press and hold the selected remaining choice a, b, or c above, until the siren emits a long "chirp" to confirm that programming of unlock channel was successful.
9. Press and release the valet push-button switch one time.
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12. Press and release the valet push-button switch one time.
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ERASING TRANSMITTERS IF THEY HAVE BEEN LOST OR STOLEN: NOTE: Before you begin to erase the lost or stolen transmitter(s), have all transmitters available that you wish to remain programmed. These will be used during the program process to identify transmitters that will continue to be used.

Enter the transmitter program mode:
1. Turn the ignition switch to the “ON” position.
2. Within 10 seconds, press and release the valet/program switch three times. (Siren emits 1 short chirp indicating channel 1 has been entered)
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4. Press and hold any unused button or combination of buttons until a long chirp is heard from the siren. Release and press the button or button combination again and again until all remaining slots are full. NOTE: The button or combination of buttons entered will also control the armor arm/disarm function until additional transmitters are added. All unwanted transmitters are now deleted.

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